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用热台偏光显微镜、Ｘ射线衍射和ＤＳＣ研究了含胆甾介晶基元和偶氮苯光色基元侧链共聚硅氧烷（ＰＳＩ）的液晶性．将非介晶基元并入液晶均聚物，所得共聚物的液晶态类型不变，仍显示近晶型织构，在ＰＳＩ共聚物中，保持液晶性的含介晶基元单体的最低极限组成为６０ｍｏｌ％．在液晶性存在的范围内，共聚物的清亮点由１３０℃升至１７０℃，液晶共聚物的热稳定性随非介晶组分含量的增加而增强．
The liquid crystallinity of the side chain polysiloxanes (PSIs) containing cholesteric mesogen and azobenzene photochromic groups was investigated by hot stage polarizing microscope, X-ray diffraction and DSC. The incorporation of non-mesogen into the liquid crystal homopolymer resulted in the same type of liquid crystal state of the resulting copolymer, still showing smectic texture, with the lowest in the PSI copolymer that contained liquid crystalline mesogenic monomer The limit composition is 60 mol%. In the presence of liquid crystallinity, the clearing point of the copolymer increased from 130 ℃ to 170 ℃. The thermal stability of the copolymer increased with the increase of the content of non-mesogenic components.